Python 一次读取整个文件
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read whole file at once
提问by peter
I need to read whole source data from file something.zip (not uncompress it)
我需要从文件 something.zip 中读取整个源数据（不是解压缩它）
I tried
我试过
f = open('file.zip')
s = f.read()
f.close()
return s
but it returns only few bytes and not whole source data. Any idea how to achieve it? Thanks
但它只返回几个字节而不是整个源数据。知道如何实现它吗？谢谢
采纳答案by falsetru
Use binary mode(b) when you're dealing with binary file.
b处理二进制文件时使用二进制模式( )。
def read_zipfile(path):
with open(path, 'rb') as f:
return f.read()
BTW, use withstatementinstead of manual close.
顺便说一句，使用withstatement而不是 manual close。
回答by AlG
This should do it:
这应该这样做：
In [1]: f = open('/usr/bin/ping', 'rb')
In [2]: bytes = f.read()
In [3]: len(bytes)
Out[3]: 9728
For comparison, here's the file I opened in the code above:
为了比较，这里是我在上面的代码中打开的文件：
-rwx------+ 1 xx yy 9.5K Jan 19 2005 /usr/bin/ping*
回答by Jon Clements
As mentioned there is an EOF character (0x1A) that terminates the .read()operation. To reproduce this and demonstrate:
如前所述，有一个0x1A终止.read()操作的 EOF 字符 ( ) 。要重现这一点并演示：
# Create file of 256 bytes
with open('testfile', 'wb') as fout:
fout.write(''.join(map(chr, range(256))))
# Text mode
with open('testfile') as fin:
print 'Opened in text mode is:', len(fin.read())
# Opened in text mode is: 26
# Binary mode - note 'rb'
with open('testfile', 'rb') as fin:
print 'Opened in binary mode is:', len(fin.read())
# Opened in binary mode is: 256
